Long ago when Equestria was taking its first steps many settlements were being formed to be turned into official cities. Many made it through, some didn't, but one was completely lost forever. No one knows what truly happened to it. Some say the settlement and its residence were swallowed by the Everfree Forest never to be heard from again. Though there was one survivor of the settlement, and she would sing that very lullaby to her future children. The lullaby, she said, came from the last very last moments of her settlement.